s = str(input())
if s.count('RRR') == 1:
    print(3)
elif s.count('RR') == 1:
    print(2)
elif 1 <= s.count('R'):
    print(1)
else:
    print(0) s = str(input()) s str(input()) str input() input if s.count('RRR') == 1:
    print(3)
elif s.count('RR') == 1:
    print(2)
elif 1 <= s.count('R'):
    print(1)
else:
    print(0) s.count('RRR') == 1 s.count('RRR') s.count s count 'RRR' 1 print(3) print 3 elif s.count('RR') == 1:
    print(2) s.count('RR') == 1 s.count('RR') s.count s count 'RR' 1 print(2) print 2 elif 1 <= s.count('R'):
    print(1) 1 <= s.count('R') 1 s.count('R') s.count s count 'R' print(1) print 1 print(0) print 0 s = str(input()) str(input()) s
s = str(input())
if s.count('RRR') == 1:
    print(3)
elif s.count('RR') == 1:
    print(2)
elif 1 <= s.count('R'):
    print(1)
else:
    print(0)